Datenblatt-Suchmaschine für elektronische Bauteile |
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SN74AC245-EP Datenblatt(PDF) 5 Page - Texas Instruments |
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SN74AC245-EP Datenblatt(HTML) 5 Page - Texas Instruments |
5 / 10 page SN74AC245EP OCTAL BUS TRANSCEIVER WITH 3STATE OUTPUTS SCAS780 − OCTOBER 2004 5 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 switching characteristics over recommended operating free-air temperature range, VCC = 5 V " 5 V (unless otherwise noted) (see Figure 1) PARAMETER FROM TO TA = 25°C MIN MAX UNIT PARAMETER FROM (INPUT) TO (OUTPUT) MIN TYP MAX MIN MAX UNIT tPLH A or B B or A 1.5 3.5 6.5 1 7 ns tPHL A or B B or A 1.5 3.5 6 1 7 ns tPZH OE A or B 1.5 5 8.5 1 9 ns tPZL OE A or B 1.5 5.5 9 1 9.5 ns tPHZ OE A or B 1.5 5.5 9 1 10 ns tPLZ OE A or B 1.5 5.5 9 1 10 ns operating characteristics, VCC = 5 V, TA = 25°C PARAMETER TEST CONDITIONS TYP UNIT Cpd Power dissipation capacitance per transceiver CL = 50 pF, f = 1 MHz 45 pF PARAMETER MEASUREMENT INFORMATION tPHL tPLH tPLH tPHL Input Out-of-Phase Output 50% 50% 50% VCC 50% VCC 50% VCC 50% VCC VCC 0 V VOL VOH VOH VOL In-Phase Output VOLTAGE WAVEFORMS From Output Under Test CL = 50 pF (see Note A) LOAD CIRCUIT S1 2 × VCC 500 Ω 500 Ω Output Control (low-level enabling) Output Waveform 1 S1 at 2 × VCC (see Note B) Output Waveform 2 S1 at Open (see Note B) VOL VOH tPZL tPZH tPLZ tPHZ 50% VCC 50% VCC ≈VCC 0 V 50% VCC VOL + 0.3 V 50% VCC VOH − 0.3 V ≈0 V VCC Open VOLTAGE WAVEFORMS tPLH/tPHL tPLZ/tPZL tPHZ/tPZH Open 2 × VCC Open TEST S1 NOTES: A. CL includes probe and jig capacitance. B. Waveform 1 is for an output with internal conditions such that the output is low, except when disabled by the output control. Waveform 2 is for an output with internal conditions such that the output is high, except when disabled by the output control. C. All input pulses are supplied by generators having the following characteristics: PRR ≤ 1 MHz, ZO = 50 Ω, tr v 2.5 ns, tf v 2.5 ns. D. The outputs are measured one at a time, with one input transition per measurement. Figure 1. Load Circuit and Voltage Waveforms |
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Ähnliche Beschreibung - SN74AC245-EP |
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